eva‎luation of RAMS architecture and management in railway signaling systems

4/4/2023 12:00:00 AM

Considering the high sensitivity of railway signaling systems in terms of safety and functionality, the design and development of these systems must be in accordance with the principles and rules to obtain the desired level of safety and reliability and in accordance with relevant standards. Among these equipments are the interlocking system and control boards (in this thesis, the control board of the road circuit is eva‎luated), which have the task of controlling and monitoring the equipment on the side of the line.In this thesis, after examining the importance of system architecture eva‎luation, introducing and reviewing reliability analysis methods proposed by related standards in the field of reliability analysis of a signaling system example, the architectures implemented in this field, to the design and analysis of the architecture of an electronic signaling board The example (control board of the road circuit), as well as the analysis of error states and cause and effect and instructions to increase the efficiency of the system are presented. In the continuation of the thesis process, by obtaining sufficient information on how to eva‎luate and verify the embedded electronic systems, the design of software tools according to the standard to perform the design and testing process has been discussedThis tool is coded in C# language and in Visual Studio. In this tool, 14 main hardware blocks are defined in order to design the high level of the electronic board. In line with the designed program, by determining the blocks needed in the design and production of the sample board and the reliability level and the number of their redundancies, the FMEA table is extracted as the first output of the software according to the information entered in the form of an Excel table. In the following, the machine language has been converted into an integrated modeling language in PLANT UML format to draw the system architecture. Finally, the reliability calculation of individual blocks and the whole system is discussed. In order to calculate reliability, two parameters MTTF and Reliability are taken into account, and their values are extracted from the technical specification documents of electronic components (datasheet)

قابليت اطمينان , تجزيه و تحليل حالات خرابي و اثرات آن

Reliability , FMEA

donya sheikhi

dr bahman ghorbani